The last episode of Hidamari Sketch x Honeycomb has some old Crystal Clear and Nuvola icons

Here's the icons found on Wikimedia Commons:

https://commons.wikimedia.org/wiki/File:Crystal_Project_Globe2.png

https://commons.wikimedia.org/wiki/File:Schedule.png

https://commons.wikimedia.org/wiki/File:Crystal_Project_Agt_multimedia.png

https://commons.wikimedia.org/wiki/File:Crystal_Project_wallet.png

https://commons.wikimedia.org/wiki/File:Nuvola_apps_kteatime.png

https://commons.wikimedia.org/wiki/File:Nuvola_apps_clock.png

https://commons.wikimedia.org/wiki/File:Nuvola_apps_package_graphics.svg

There's also the dictionary icon still present now in Plasma 6's widget picker!